Pod
- Pododesmus
Pog
- Pogonodon
Poi
- Poirieria
Pol
- Polemicella
- Policordia
- Polinices
- Polititapes
- Politoleda
- Pollia
- Polybranchia
- Polycera
- Polycerella
- Polyceridae
- Polyceroidea
- Polygireulima
Polygona Schumacher, 1817
- Polygona abbotti (Snyder, 2003)
- Polygona anapetes (Woodring, 1964)
- Polygona angulata (Röding, 1798)
- Polygona bayeri (Petuch, 2001)
- Polygona bernadensis (Bullock, 1974)
- Polygona brevicaudata (Reeve, 1847)
- Polygona concentrica (Reeve, 1847)
- Polygona devyanae (Rios, Costa & Calvo, 1994)
- Polygona infundibulum (Gmelin, 1791)
- Polygona jucunda (McGinty, 1940)
- Polygona lactea (Matthews-Cascon, Matthews & Rocha, 1991)
- Polygona martini (Snyder, 1988)
- Polygona nemata (Woodring, 1928)
- Polygona paulae Petuch, 2013
- Polygona socorroensis (Hertlein & Strong, 1951)
- Polygona tumens (Carpenter, 1856)
- Polygona vermeiji (Petuch, 1986)
Mollusca → Gastropoda → Neogastropoda → Buccinoidea → Fasciolariidae → Fasciolariinae
- Polymesoda
- Polyplacophora
- Polypylis
- Polyschides
- Polyspirella
- Polystira
Pom
- Pomacea
- Pomatiopsidae
- Pomatiopsis
- Pomaulax
- Pomella
- Pompholigina
- Pomus
Pon
- Ponderia
- Ponderinella
- Ponderoceras
- Pontiothauma
- Pontiturboella
- Pontobelgrandiella
- Pontohedyle
Pop
- Popenaias
Por
- Poroleda
- Poromya
- Poromyidae
- Poromyoidea
- Porosalvania
- Porterius
- Portlandia
Pos
- Posorites
- Posticobia
Pot
- Potadoma
- Potadomoides
- Potamides
- Potamididae
- Potamilus
- Potamocorbula
- Potamolithus
- Potamopyrgus
- Potenatomus
- Potomida
Pou
- Poumea
Pow
- Powellina
Powelliphanta O'Connor, 1945
- Powelliphanta annectens (Powell, 1936)
- Powelliphanta augusta K. Walker, Trewick & Barker, 2008
- Powelliphanta fiordlandica (Climo, 1971)
- Powelliphanta fletcheri (Powell, 1938)
- Powelliphanta gagei (Powell, 1938)
- Powelliphanta gilliesi (E. A. Smith, 1880)
- Powelliphanta hochstetteri (L. Pfeiffer, 1862)
- Powelliphanta lignaria (Hutton, 1888)
- Powelliphanta marchanti (Powell, 1932)
- Powelliphanta patrickensis (Powell, 1949)
- Powelliphanta rossiana (Powell, 1938)
- Powelliphanta spedeni (Powell, 1932)
- Powelliphanta superba (Powell, 1930)
- Powelliphanta traversi (Powell, 1930)
Animalia → Mollusca → Gastropoda → Heterobranchia → Rhytididae
Powellisetia Ponder, 1965
- Powellisetia arnaudi Ponder, 1983
- Powellisetia australis (Watson, 1886)
- Powellisetia bilirata Ponder, 1965
- Powellisetia comes (Finlay, 1926) †
- Powellisetia crassilabrum (Powell, 1940)
- Powellisetia deserta (E. A. Smith, 1907)
- Powellisetia epulata (Laws, 1941) †
- Powellisetia fallax Kay, 1979
- Powellisetia gradata (Suter, 1908)
- Powellisetia helena (Turton, 1932)
- Powellisetia inornata (Strebel, 1908)
- Powellisetia lineata (E. C. Smith, 1962)
- Powellisetia microlirata Ponder & Worsfold, 1994
- Powellisetia microstriata (Murdoch, 1905)
- Powellisetia paroeca (Finlay, 1924) †
- Powellisetia pelseneeri (Thiele, 1912)
- Powellisetia philomelae (Watson, 1886)
- Powellisetia ponderi Numanami, 1996
- Powellisetia porcellana (Suter, 1908)
- Powellisetia porcellanoides (Powell, 1937)
- Powellisetia principis (Watson, 1886)
- Powellisetia prisca (Finlay, 1924) †
- Powellisetia retusa (Powell, 1927)
- Powellisetia simillima (May, 1915)
- Powellisetia subgradata (Powell, 1937)
- Powellisetia subtenuis (Powell, 1937)
- Powellisetia tenuisculpta (Powell, 1933)
- Powellisetia unicarinata (Powell, 1930)
- Powellisetia varicosa Ponder, 1983
Mollusca → Gastropoda → Littorinimorpha → Rissooidea → Rissoidae